Set Registry ....please explain

EB31

Hi all,

I'm newer than new on using the PSA Registry..so could someone please explain how the "Weighted GPa" works and what it means?


Here are my stats:

Pete Rose Basic set:

18th overall

8.33 Weighted GPA

34.21% Complete

2.76 Set Rating


I am ok with everything else except that darn Weighted GPA thing.


Thanks,
EB31

phreakydancin

Click on View Set Composition and you'll see that cards are given weights depending on their relative value. In the Pete Rose Basic set, his RC is valued at 10, while cards from 1980 onwards are valued at 1 each towards the overall set score.

LWMM

...Then, using the individual item ratings, the grade of each item, the completion percentage and set size, a unique formula is created for each set in the registry. To be specific, the weighted grade point average is determined by multiplying the grade of each item listed in a set by the weight of the item. (Note that for calculation purposes a non-graded authenticated item receives a default grade of 3.) Then these totals are summed and divided by the total sum for weights of those items. The final set rating is achieved by dividing the weighted grade sum by the total sum of the weights in the entire set. Now, while this is NOT an exact science, the formula should provide an accurate evaluation of each set registered on our site. This means you can compare your prized sets to the best the hobby has to offer.

EB31

Ok, thanks for the explanation guys.


I am guessing that my weighted GPA is good for the limited amount of cards I have on there?

mikeschmidt

<< <i>Ok, thanks for the explanation guys.


I am guessing that my weighted GPA is good for the limited amount of cards I have on there? >>



Yes - it basically means you have more of the important cards [e.g. cards like rookie and first few cards] and less of the cards, like Sportscaster deck.

cravetopps

take all the cards you have which are graded and multiply each cards weight by your PSA grade (assuming you have no qualifiers). Add them up and now you have your numerator. So, if you have five cards and they each got 8s and all of them have a weight of 2, your numerator would be 80.

then add up the weights for all the cards you have, so for example if you have 5 cards and they each have a weight of 2, then the total weight of all your cards is 10. That is the denominator.

The math is 80/10 so your weighted GPA is 8. You can see that is you had one 9 with a weight of 3, it would take your weighted GPA up.

fsjeter

I sent you a PM regarding sending you an Excel spreadsheet to track your set. LMK!

Scott